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Approximately completely reconstructed satellite-borne low-complexity non-uniform bandwidth digital channelizer

A digital channelization and low-complexity technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve the problem of occupying multiplier resources and achieve the effects of low reconstruction error, narrow transition bandwidth, and narrow transition band

Active Publication Date: 2019-07-02
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

However, this method still occupies a lot of multiplier resources when completing the analysis and synthesis process of the entire on-board digital channelizer

Method used

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  • Approximately completely reconstructed satellite-borne low-complexity non-uniform bandwidth digital channelizer
  • Approximately completely reconstructed satellite-borne low-complexity non-uniform bandwidth digital channelizer
  • Approximately completely reconstructed satellite-borne low-complexity non-uniform bandwidth digital channelizer

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0023] Reference figure 1 with figure 2 , The present invention includes the following steps:

[0024] Step 1. Design a prototype low-pass half-band filter H l (z).

[0025] The prototype low-pass half-band filter is designed according to the performance requirements of the on-board digital channelizer. The system performance requirements of the digital channelizer are as follows

[0026] (1). The channel bandwidth is 160MHz, divided into 64 sub-channels;

[0027] (2). The effective bandwidth in the channel is 120MHz, including 48 sub-channels;

[0028] (3). The sub-channel bandwidth is 2.5MHz;

[0029] (4). The guard interval between sub-channels is 200KHz;

[0030] From this, the prototype low-pass half-band filter H l The normalized transition bandwidth of (z) is 0.2 / 2.5=0.08. The normalized parameters of the selected prototype low-pass half-band filter are shown ...

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Abstract

The invention provides an approximately completely reconstructed satellite-borne low-complexity non-uniform bandwidth digital channelization device, which is used for solving the technical problems ofhigh reconstruction error, wide protection interval and high calculation complexity of the existing satellite-borne digital channelization device. The implementation method comprises the following steps: designing a prototype low-pass half-band filter; designing a corresponding complementary high-pass half-band filter according to the prototype low-pass half-band filter; taking the prototype low-pass half-band filter up-sampling as an upper branch primary filter, and taking the prototype complementary high-pass half-band filter up-sampling as a lower branch primary filter; designing an upperbranch secondary filter and a lower branch secondary filter and performing multiphase decomposition; signal reconstruction is completed through transposition of multiphase decomposition of upper and lower branch secondary filters. According to the method, the reconstruction error of the original spaceborne digital channelizer is reduced, the guard interval width is reduced, the calculation complexity is reduced, and the method is simple, efficient and easy to implement.

Description

Technical field [0001] The invention belongs to the technical field of digital signal processing, and relates to an approximately complete reconstruction of a satellite-borne low-complexity non-uniform bandwidth digital channelizer, and in particular to a method for realizing a digital channelizer in a satellite-borne flexible transponder. Background technique [0002] With the rapid development of modern communication technology, the broadband satellite mobile communication system, as an important link in global mobile communication, has developed in recent years towards larger communication capacity, stronger on-board processing capabilities, and wider communication coverage. As an important part of on-board processing, space-borne flexible transponders have more flexible on-board processing capabilities and lower computational complexity than traditional transparent transponders and processing transponders. Among them, as satellite communication spectrum resources increase, Wi...

Claims

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/1851
Inventor 田斌李鹏超李晨曦席巾荣
Owner XIDIAN UNIV
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